WASHINGTON (CBSDC/AP) — The Pentagon says a 31-year-old from northern Virginia was one of three marines killed in Afghanistan last week.

Gunnery Sgt. Ryan Jeschke of Herndon, Va., died Friday while conducting combat operations in Helmand province, Afghanistan.

Jeschke was assigned to 1st Marine Special Operations Battalion, Camp Pendleton, Calif.

Twenty-nine year-old Matthew P. Manoukian of Los Altos Hills, Calif. and 27-year-old Staff Sgt. Sky R. Mote of El Dorado, Calif. were also killed.

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